Nicki Minaj is shaking up the ‘Gram once again. The bootylicious rapper posted a couple videos of herself twerking while previewing a new song. Her back faces the camera as she slowly winds her famous ass up and down.

“This aint me. It’s a friend of mine,” joked Nicki.

But the melodic song is not the one that she plans to debut in the coming week. “Lol. That’s not THEE song. I promise,” she told her fans.

Nicki will make her acting debut alongside Cameron Diaz in the romantic comedy The Other Woman, which hits theaters on Friday.

Watch the rump shaker in action below.